Operating and Storage Junction Temperature Range: -55 to +150 °C
Package: TO-3P
Pinout of 2SB688R
Here is an image showing the pin diagram of this transistor.
Classification of hFE
The 2SB688R transistor can have a current gain of 55 to 110. The gain of the 2SB688 will be in the range from 55 to 160, for the 2SB688O it will be in the range from 80 to 160.
Marking
Sometimes the "2S" prefix is not marked on the package - the 2SB688R might only be marked "B688R".
Complementary NPN transistor
The complementary NPN transistor to the 2SB688R is the 2SD712R.